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Maths-

General

Easy

Question

$open vertical bar table row 103 115 114 row 111 108 106 row 104 113 116 end table close vertical bar plus open vertical bar table row 113 116 104 row 108 106 111 row 115 114 103 end table close vertical bar$ is equal to :

a positive number
a negative number
Zero
none of these

The correct answer is: Zero

$open vertical bar table row 103 115 114 row 111 108 106 row 104 113 116 end table close vertical bar$ - $open vertical bar table row 104 116 113 row 111 106 108 row 103 114 115 end table close vertical bar$
Applying R₁ < R₃
= $open vertical bar table row 103 115 114 row 111 108 106 row 104 113 116 end table close vertical bar$ + $open vertical bar table row 103 114 115 row 111 106 108 row 104 116 113 end table close vertical bar$
Applying C₂ < C₃
= $open vertical bar table row 103 115 114 row 111 108 106 row 104 113 116 end table close vertical bar$ - $open vertical bar table row 103 115 114 row 111 108 106 row 104 113 116 end table close vertical bar$ = 0
Hence (c) is the correct answer.

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The system AX = B of n equations in n unknowns has infinitely many solutions if

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parallel

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Two vibrating tuning forks produce progressive waves given by y_l = 4 sin 500 pt and Y₂ = 2 sin 506pt Number of beats produced per minute is

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parallel

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parallel

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Chemistry-General

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Chemistry-General

parallel

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